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介绍了主跨为114 m的预应力混凝土连续刚构桥的病害情况,分析产生病害的原因主要是边中跨比设置不合理,通过裂缝灌胶、增加体外预应力束、粘贴钢板等传统的加固方式,都无法解决桥梁的不合理受力状况,通过在边跨增设桥塔,利用斜拉加固法降低桥梁的边中跨比,彻底解决了受力的不合理状况,确保了桥梁的承载力,跨中挠度得到了控制。
The failure condition of the prestressed concrete continuous rigid frame bridge with main span of 114 m is introduced. The reasons for the disease are analyzed as follows. The main causes of the disease are the unreasonable setting of the span ratio of the sides, the filling of plastic through cracks, the increase of external prestressing strands, Reinforcement way, can not solve the unreasonable stress situation of the bridge, through the addition of side pylons in the span, the use of oblique reinforcement method to reduce the side-to-side ratio of the bridge, completely solved the unreasonable stress conditions, to ensure the bearing of the bridge Force, mid-span deflection has been controlled.